Material surface particle detection and analysis instrument and detection and analysis method thereof

Abstract

The present invention discloses a material surface particle detection analyzer and a detection and analysis method thereof, comprising a housing, a touch screen, a printer, a sampling lower cover, a sampling upper cover, a circuit board, a storage disk, a switching power supply, a laser sensor and a sensor fan, wherein a sampling chamber is formed between the sampling upper cover and the sampling lower cover, the sampling chamber is connected to a vacuum pump via a first air pipe, the laser sensor is connected to the sampling chamber via a second air pipe, the sampling upper cover is driven to lift and lower by a screw transmission mechanism to realize opening and closing with the sampling lower cover, the detection analyzer is further provided with a dropper containing calibration particles, the air inlet end of the dropper is connected to the vacuum pump, the air outlet end of the dropper is connected to the laser sensor, and the air inlet end of the vacuum pump is connected to a filter. The present invention adopts a screw transmission mechanism to drive the upper cover to lift and lower to realize opening and closing with the sampling lower cover, which can prevent particles on the surface of the material to be detected from being vibrated or falling, and adopts a dual air path structure, which can perform detection calibration to ensure its detection accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of packaging material surface particle detection, and in particular relates to a material surface particle detection analyzer and a detection and analysis method thereof. Background Art

[0002] Some products with particularly high environmental requirements will be tested for particles on the surface of their packaging materials. Currently, the detection of particles on the surface of packaging materials is often affected by particles in the external environment, resulting in the lack of guaranteed detection accuracy.

[0003] Therefore, some manufacturers have designed monitoring analyzers that can place the material to be tested in a sealed environment for testing, which can reduce the impact of the external environment on the detection accuracy. However, at present, the monitoring analyzers on the market use manual assisted opening and closing between the sampling upper cover and the sampling lower cover. The material to be tested is placed on the sampling lower cover, and the sampling upper cover is manually pulled so that the sampling upper cover is closed on the sampling lower cover to form a closed sampling chamber. In order to improve the sealing effect between the sampling upper cover and the sampling lower cover, this structure is designed with a certain downward pressure elastic force on the sampling upper cover. When the sampling upper cover is manually put on the sampling lower cover, a rigid collision occurs between the sampling lower cover, causing the material to be tested on the sampling upper cover to vibrate to a certain extent, causing the particles on the surface of the material to be tested to be shaken away or even fall off to a certain extent, thereby affecting the accuracy of the detection and analysis.

[0004] Moreover, conventional detection analyzers usually have a single gas path structure and do not have a calibration function, so detection calibration is impossible. Summary of the Invention

[0005] In order to solve the defects and shortcomings of the above-mentioned prior art, the present invention provides a material surface particle detection analyzer and its detection and analysis method, which adopts a screw transmission mechanism to drive the upper cover to lift and lower to realize the opening and closing between the upper cover and the sampling lower cover, so that the sampling upper cover is very stable when it is covered on the sampling lower cover, preventing the particles on the surface of the material to be tested from being shaken or falling, thereby improving its detection accuracy; at the same time, a calibration air circuit is designed so that it can perform detection calibration to ensure its detection accuracy.

[0006] The technical solution of the present invention is: a material surface particle detection analyzer, comprising a shell, a touch screen arranged on the shell, a printer, a sampling lower cover and a sampling upper cover, and a circuit board, a storage disk, a switching power supply, a laser sensor and a sensor fan arranged in the shell, a sampling chamber is formed between the sampling upper cover and the sampling lower cover, the sampling chamber is connected to a vacuum pump through a first air pipe, the circuit board is respectively connected to the switching power supply, the laser sensor, the sensor fan and the vacuum pump, the laser sensor is connected to the sampling chamber through a second air pipe, the sampling upper cover is driven to rise and fall by a wire rod transmission mechanism to realize the opening and closing between the sampling lower cover, and a dropper containing calibration particles is also provided inside the detection analyzer, the air inlet end of the dropper is connected to the vacuum pump, the air outlet end of the dropper is connected to the laser sensor, and the air inlet end of the vacuum pump is connected to a filter.

[0007] The present invention adopts a screw transmission mechanism to drive the upper cover to lift and lower the sampling cover to realize the opening and closing between the upper cover and the sampling lower cover, so that the upper cover is very stable when it is covered on the lower cover, preventing the particles on the surface of the material to be tested from being shaken or falling, thereby improving its detection accuracy; at the same time, a calibration air path is designed to cooperate with the detection air path to realize a dual air path structure, so that it can perform detection calibration to ensure its detection accuracy.

[0008] Preferably, the screw transmission mechanism includes a support base, a vertical slide rail installed on the support base, a stepper motor installed in the support base, a screw connected to the stepper motor and a slider connected to the screw for lifting and lowering. The sampling cover is connected to the slider through a vertical connecting rod, and the first air pipe and the second air pipe are both connected to the sampling cover through an air pipe joint.

[0009] This structure ensures that the screw transmission mechanism drives the sampling cover to rise and fall smoothly and reliably, and further ensures the smooth opening and closing of the sampling cover.

[0010] Preferably, the lower part of the vertical slide rail is provided with a screw lower support that cooperates with the screw rod, and a lower limit switch is provided on one side of the screw lower support. The top of the vertical slide rail is provided with a screw upper support that cooperates with the screw rod, and an upper limit switch is provided on one side of the screw upper support.

[0011] This structure further ensures the stability and reliability of the lifting of the sampling cover.

[0012] Preferably, the lower end of the screw rod is connected to the motor shaft of the stepper motor through a coupling, the lower part of the vertical connecting rod is fixed to the slider through a connecting rod fixing plate, and the back of the sampling cover is provided with a connecting rod mounting groove that matches the vertical connecting rod, and the upper end of the vertical connecting rod is inserted into the connecting rod mounting groove and fixed by a locking bolt.

[0013] This structure ensures that the stepper motor drives the lead screw to rotate smoothly and reliably, while ensuring that the vertical connecting rod is firmly and reliably connected to the slider and the sampling cover respectively.

[0014] Preferably, the housing includes a bottom plate and an upper cover, one side of the upper cover is provided with an inclined surface, the touch screen is installed on the inclined surface, the sampling lower cover is installed on the other side of the upper cover, the upper side of the inclined surface is provided with an upper plane, the lower side of the inclined surface is provided with a lower plane, the printer is installed on the upper plane, and the position of the laser sensor corresponds to the position of the lower plane.

[0015] This structure facilitates the operation and observation of the touch screen, and is compact and beautiful in appearance.

[0016] Preferably, the support base is fixed on the bottom plate, and a base connecting plate is connected to the support base, the laser sensor and the sensor fan are fixed on the base connecting plate, the sampling lower cover is fixed on the base connecting plate through a support column, and the sensor fan is fixed on the bottom side of the support column.

[0017] This structure ensures the installation reliability of each component on the base plate and ensures its working stability.

[0018] Preferably, the switching power supply and the circuit board are mounted on the inner back side of the upper cover, and the outer back side of the upper cover is provided with a switch button and a power plug for the switching power supply and two adjustment knobs for the circuit board.

[0019] Preferably, an access plate is provided on the rear side of the base plate, the width of the access plate matches the width of the upper plane, and four feet are provided on the bottom of the base plate.

[0020] This structure facilitates the inspection and maintenance of internal components while ensuring their support stability.

[0021] A detection and analysis method for a material surface particle detection analyzer, the steps are as follows:

[0022] 1) When the sampling upper cover is open, place the material to be tested on the sampling lower cover. The screw transmission mechanism drives the sampling upper cover down to close with the sampling lower cover to form a sampling chamber.

[0023] 2) The clean air pumped in by the vacuum pump blows up the particles on the surface of the material in the sampling chamber, and the blown particles are first stored in the second air pipe along with the air flow;

[0024] 3) The sensor fan draws the particles stored in the second air duct through the laser sensor and is detected by the laser sensor;

[0025] 4) The signal detected by the laser sensor is analyzed by the signal sampling and analysis circuit to identify the number and size of the particles;

[0026] 5) The control circuit reads the analysis results, prints the report, saves the test data to a storage disk for backup, or uploads it to a PC for backup.

[0027] Preferably, the signal sampling and analysis circuit in step 4) and the control circuit in step 5) are both integrated on a circuit board, and the operator sets system parameters and controls the start and stop of calibration and detection through a touch screen.

[0028] The present invention adopts a screw transmission mechanism to drive the upper cover to lift and lower the sampling cover to realize the opening and closing between the upper cover and the sampling lower cover, so that the upper cover is very stable when it is covered on the lower cover, preventing the particles on the surface of the material to be tested from being shaken or falling, thereby improving its detection accuracy; at the same time, a calibration air path is designed to cooperate with the detection air path to realize a dual air path structure, so that it can perform detection calibration to ensure its detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the internal structure of the present invention after the gas circuit is removed;

[0030] Figure 2 It is a structural schematic diagram of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the present invention after the access panel is removed;

[0032] Figure 4 This is a schematic structural diagram of the sampling cover in the present invention;

[0033] Figure 5 It is the gas path principle diagram of the present invention;

[0034] In the figure, 1. upper cover, 2. bottom plate, 3. touch screen, 4. printer, 5. sampling lower cover, 6. sampling upper cover, 7. circuit board, 8. switching power supply, 9. laser sensor, 10. sensor fan, 11. first air pipe, 12. second air pipe, 13. sampling chamber, 14. support base, 15. vertical slide rail, 16. stepper motor, 17. lead screw, 18. slider, 19. vertical connecting rod, 20. lead screw lower support, 21. lower limit switch, 22. lead screw upper support, 23. upper limit switch, 24. coupling, 25. connecting rod fixing plate, 26. connecting rod mounting slot, 27. inclined plane, 28. upper plane, 29. lower plane, 30. base connecting plate, 31. support column, 32. switch button, 33. power plug, 34. adjustment knob, 35. foot, 36. air pipe joint. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings, but this does not limit the scope of protection of the present invention.

[0036] like Figure 1-4As shown, a material surface particle detection analyzer includes a housing, a touch screen 3 arranged on the housing, a printer 4, a sampling lower cover 5 and a sampling upper cover 6, and a circuit board 7, a storage disk, a switching power supply 8, a laser sensor 9 and a sensor fan 10 arranged in the housing. A sampling chamber 13 is formed between the sampling upper cover 6 and the sampling lower cover 5. The sampling chamber 13 is connected to a vacuum pump through a first air pipe 11. The circuit board 7 is respectively connected to the switching power supply 8, the laser sensor 9, the sensor fan 10 and the vacuum pump. The laser sensor 9 is connected to the sampling chamber 13 through a second air pipe 12. The sampling upper cover 6 is driven to rise and fall by a wire rod transmission mechanism to realize opening and closing with the sampling lower cover 5. A dropper containing calibration particles is also provided inside the detection analyzer. The air inlet end of the dropper is connected to the vacuum pump, the air outlet end of the dropper is connected to the laser sensor 9, and the air inlet end of the vacuum pump is connected to a filter. The screw drive mechanism includes a support base 14, a vertical slide rail 15 mounted on the support base 14, a stepper motor 16 mounted in the support base 14, a screw rod 17 connected to the stepper motor 16, and a slider 18 connected to the screw rod 17 for lifting. The sampling cover 6 is connected to the slider 18 via a vertical connecting rod 19. The first air pipe 11 and the second air pipe 12 are both connected to the sampling cover 6 via an air pipe joint 36. A screw lower support 20 that cooperates with the screw rod 17 is provided at the lower part of the vertical slide rail 15, and a lower limit switch 21 is provided on one side of the screw lower support 20. A screw upper support 22 that cooperates with the screw rod 17 is provided at the top of the vertical slide rail 15, and an upper limit switch 23 is provided on one side of the screw upper support 22. The lower end of the screw rod 17 is connected to the motor shaft of the stepper motor 16 via a coupling 24. The lower portion of the vertical connecting rod 19 is fixed to the slider 18 via a connecting rod fixing plate 25. The back of the sampling cover 6 is provided with a connecting rod mounting groove 26 that matches the vertical connecting rod 19. The upper end of the vertical connecting rod 19 is inserted into the connecting rod mounting groove 26 and fixed by a locking bolt. The housing includes a base plate 2 and an upper cover 1. One side of the upper cover 1 is provided with an inclined surface 27. The touch screen 3 is mounted on the inclined surface 27. The sampling lower cover 5 is mounted on the other side of the upper cover 1. The upper side of the inclined surface 27 is provided with an upper flat surface 28, and the lower side of the inclined surface 27 is provided with a lower flat surface 29. The printer 4 is mounted on the upper flat surface 28. The position of the laser sensor 9 corresponds to the position of the lower flat surface 29. The support base 14 is fixed to the bottom plate 2, and a base connecting plate 30 is connected to the support base 14. The laser sensor 9 and sensor fan 10 are fixed to the base connecting plate 30. The sampling lower cover 5 is fixed to the base connecting plate 30 via a support column 31, and the sensor fan 10 is fixed to the bottom side of the support column 31. The switching power supply 8 and circuit board 7 are mounted on the inner back side of the upper cover 1. The outer back side of the upper cover 1 is equipped with a switch button 32 and a power plug 33 for the switching power supply 8, as well as two adjustment knobs 34 for the circuit board 7. The rear side of the bottom plate 2 is equipped with an access panel, the width of which matches the width of the upper plane 28. The bottom of the bottom plate 2 is equipped with four feet 35.

[0037] A detection and analysis method for a material surface particle detection analyzer, the steps are as follows:

[0038] 1) When the sampling upper cover is open, place the material to be tested on the sampling lower cover. The screw transmission mechanism drives the sampling upper cover down to close with the sampling lower cover to form a sampling chamber.

[0039] 2) The clean air pumped in by the vacuum pump blows up the particles on the surface of the material in the sampling chamber, and the blown particles are first stored in the second air pipe along with the air flow;

[0040] 3) The sensor fan draws the particles stored in the second air duct through the laser sensor and is detected by the laser sensor;

[0041] 4) The signal detected by the laser sensor is analyzed by the signal sampling and analysis circuit to identify the number and size of the particles;

[0042] 5) The control circuit reads the analysis results, prints the report, saves the test data to a storage disk for backup, or uploads it to a PC for backup.

[0043] The signal sampling and analysis circuit in step 4) and the control circuit in step 5) are both integrated on the circuit board. The operator sets the system parameters and controls the start and stop of calibration and detection through the touch screen.

[0044] like Figure 5 As shown, the dual gas path working process of the present invention is as follows:

[0045] 1. Calibration path 1:

[0046] (1) Passing through the filter, vacuum pump, solenoid valve 2, dropper, solenoid valve 1, and laser sensor in sequence, path 1 is used for particle size calibration;

[0047] (2) Before calibration, self-clean path 1, open solenoid valve 1, open solenoid valve 2, close solenoid valve 3, turn on the vacuum pump, and operate the laser sensor until the detection result of the laser sensor meets the requirements.

[0048] (3) Solenoid valve 1 is closed and the vacuum pump is turned on; the filtered clean air is pumped into the dropper by the vacuum pump to blow up the powder and enter the storage pipeline;

[0049] (4) The vacuum pump is turned off, solenoid valve 1 is opened, the sensor fan draws air from the pipeline at a constant flow, and the powder passes through the sensor and is detected by the laser sensor;

[0050] (5) The signal analysis sampling circuit samples the detection signal;

[0051] (6) The sampling data is uploaded to the host computer, and through PC statistical analysis, the particle size signal calibration parameters are obtained, and then sent to the circuit board for calibration settings;

[0052] 2. Detection path 2:

[0053] (1) Passing through the filter, vacuum pump, solenoid valve 3, sampling chamber, solenoid valve 1, and sensor in sequence, path 2 is used to detect particles on the surface of the material;

[0054] (2) Before testing, self-clean path 2, open solenoid valve 1, close solenoid valve 2, turn on the vacuum pump, and operate the laser sensor until the number of particles detected by the laser sensor reaches zero, and self-cleaning is completed;

[0055] (3) Place the material to be tested into the sampling chamber and secure it;

[0056] (4) Solenoid valve 1 is closed and solenoid valve 3 is opened; the vacuum pump is turned on to pump in filtered clean air to blow up the particles on the surface of the material in the sampling chamber and into the storage pipe;

[0057] (5) The vacuum pump stops, solenoid valve 1 opens, and the sensor fan constantly draws particles from the pipeline through the laser sensor and is detected by the laser sensor;

[0058] (6) The signal analysis sampling circuit analyzes the detection signal and counts the number and size of the particles;

[0059] (7) Read the circuit board signal and analyze the sampling circuit results, print the test report, or save the data to a storage disk or PC.

Claims

1. A material surface particle detection and analysis instrument, characterized by: It includes a housing, a touch screen arranged on the housing, a printer, a sampling lower cover and a sampling upper cover, as well as a circuit board, a storage disk, a switching power supply, a laser sensor and a sensor fan arranged in the housing. A sampling chamber is formed between the sampling upper cover and the sampling lower cover. The sampling chamber is connected to a vacuum pump through a first air pipe. The circuit board is respectively connected to the switching power supply, the laser sensor, the sensor fan and the vacuum pump. The laser sensor is connected to the sampling chamber through a second air pipe. The sampling upper cover is driven to rise and fall by a screw transmission mechanism to realize opening and closing with the sampling lower cover. A dropper containing calibration particles is also provided inside the detection analyzer. The air inlet end of the dropper is connected to the vacuum pump, the air outlet end of the dropper is connected to the laser sensor, and the air inlet end of the vacuum pump is connected to a filter. The screw transmission mechanism includes a support base, a vertical slide rail installed on the support base, a stepping motor installed in the support base, a screw connected to the stepping motor, and a slider connected to the screw for lifting and lowering. The sampling cover is connected to the slider through a vertical connecting rod, and the first air pipe and the second air pipe are both connected to the sampling cover through an air pipe joint. The lower part of the vertical slide rail is provided with a screw rod lower support that matches the screw rod, and a lower limit switch is provided on one side of the screw rod lower support. The top of the vertical slide rail is provided with a screw rod upper support that matches the screw rod, and an upper limit switch is provided on one side of the screw rod upper support; The lower end of the screw rod is connected to the motor shaft of the stepper motor through a coupling, the lower part of the vertical connecting rod is fixed to the slider through a connecting rod fixing plate, and the back of the sampling cover is provided with a connecting rod mounting groove that matches the vertical connecting rod. The upper end of the vertical connecting rod is inserted into the connecting rod mounting groove and fixed by a locking bolt.

2. The material surface particle detection and analysis instrument according to claim 1, characterized in that: The shell includes a bottom plate and an upper cover, one side of the upper cover is provided with an inclined surface, the touch screen is installed on the inclined surface, the sampling lower cover is installed on the other side of the upper cover, the upper side of the inclined surface is provided with an upper plane, the lower side of the inclined surface is provided with a lower plane, the printer is installed on the upper plane, and the position of the laser sensor corresponds to the position of the lower plane.

3. The material surface particle detection and analysis instrument according to claim 2, characterized in that: The support base is fixed on the bottom plate, and a base connecting plate is connected to the support base. The laser sensor and the sensor fan are fixed on the base connecting plate. The sampling lower cover is fixed on the base connecting plate through a support column, and the sensor fan is fixed on the bottom side of the support column.

4. The material surface particle detection and analysis instrument according to claim 2, characterized in that: The switching power supply and the circuit board are installed on the inner side of the back of the upper cover. The outer side of the back of the upper cover is provided with a switch button and a power plug matching the switching power supply and two adjustment knobs matching the circuit board.

5. The material surface particle detection and analysis instrument according to claim 4, characterized in that: An access plate is provided on the rear side of the base plate, the width of the access plate matches the width of the upper plane, and four feet are provided on the bottom of the base plate.

6. A detection and analysis method for a material surface particle detection and analysis instrument as claimed in claim 1, characterized in that: The steps are as follows: 1) When the sampling upper cover is open, place the material to be tested on the sampling lower cover. The screw transmission mechanism drives the sampling upper cover down to close with the sampling lower cover to form a sampling chamber. 2) The clean air pumped in by the vacuum pump blows up the particles on the surface of the material in the sampling chamber, and the blown particles are first stored in the second air pipe along with the air flow; 3) The sensor fan draws the particles stored in the second air duct through the laser sensor and is detected by the laser sensor; 4) The signal detected by the laser sensor is analyzed by the signal sampling and analysis circuit to identify the number and size of the particles; 5) The control circuit reads the analysis results, prints the report, saves the test data to a storage disk for backup, or uploads it to a PC for backup.

7. The detection and analysis method of the material surface particle detection and analysis instrument according to claim 6, characterized in that: The signal sampling and analysis circuit in step 4) and the control circuit in step 5) are both integrated on a circuit board. The operator sets system parameters and controls the start and stop of calibration and detection through a touch screen.

Images